Other Real Estate Owned (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2017 USD ($) property	Nov. 30, 2017 USD ($)	Jan. 03, 2017 USD ($)	Dec. 31, 2016 USD ($) property	Jun. 30, 2016 property	Jun. 23, 2016 USD ($)	Mar. 31, 2016 USD ($)
OREO
Balance at the beginning of the period	$ 18,316	$ 24,803	$ 26,499
Transfers		4,222	2,245
Additions, net	11,558	11,842	21,419
Write-downs	(2,249)	(2,270)	(3,163)
Sold	(18,853)	(20,281)	(22,197)
Balance at the end of the period	11,203	18,316	24,803
Number of properties uncovered | property				82				17
Other Real Estate, Non Covered	18,316	24,803	26,499	$ 11,203			$ 18,316			$ 4,200
Covered OREO
Balance at the beginning of the period		5,751	16,227
Transfers		(4,222)	(2,245)
Additions, net		2,151	9,283
Write-downs		(2,131)	(6,265)
Sold		(1,549)	(11,249)
Balance at the end of the period			5,751
Total
Balance at the beginning of the period	18,316	30,554	42,726
Additions, net	11,558	13,993	30,702
Write-downs	(2,249)	(4,401)	(9,428)
Sold	(18,853)	(21,830)	(33,446)
Balance at the end of the period	11,203	18,316	30,554
Number of properties held | property							90
Covered Other real estate under share agreements	18,316	30,554	42,726	11,203			$ 18,316		$ 3,000
Residential real estate consumer mortgage loans in foreclosure, carrying value				6,100
Carrying value of covered OREO assets		$ 5,751	$ 16,227
Residential real estate
Total
Other Real Estate In Foreclosure				2,600
Southeastern Bank Financial
OREO
OREO acquired in acquisition				$ 385		$ 450
Park Sterling Corporation
OREO
Transfers	2,046
OREO acquired in acquisition					$ 2,120
Total
Transfers	$ 2,046